TY - JOUR
T1 - Neutron irradiation-induced defects in Cd0.9Zn0.1Te:In crystals
AU - Bao, Lei
AU - Zha, Gangqiang
AU - Xu, Lingyan
AU - Zhang, Binbin
AU - Dong, Jiangpeng
AU - Li, Yingrui
AU - Jie, Wanqi
N1 - Publisher Copyright:
© 2019
PY - 2019/9
Y1 - 2019/9
N2 - The survivability of γ-ray detector in radiation environment of energetic neutrons is a key issue for its application in spacecraft, accelerator, nuclear reactor, etc., especially for the case of CdZnTe detectors. Nevertheless, very little attention has been paid to the radiation damage mechanism of detectors and the evolution of radiation-induced defects in the detector medium, i.e. Cd0.9Zn0.1Te:In crystals. We proposed and simulated the radiation defects type and amount of Cd0.9Zn0.1Te:In crystals after neutron irradiation with the Monte-Carlo software SRIM. The calculated data are also compared with experimental results of detector performance and the crystal defects obtained using thermally stimulated current (TSC)measurement. We also discuss the influence of defect concentrations on crystal resistivity and detector energy resolution. It was shown that the concentration of vacancies, interstitials, and their related defects increased after neutron irradiation, which could be the reason for the worsening of Cd0.9Zn0.1Te:In γ-ray detector performance after the neutron irradiation.
AB - The survivability of γ-ray detector in radiation environment of energetic neutrons is a key issue for its application in spacecraft, accelerator, nuclear reactor, etc., especially for the case of CdZnTe detectors. Nevertheless, very little attention has been paid to the radiation damage mechanism of detectors and the evolution of radiation-induced defects in the detector medium, i.e. Cd0.9Zn0.1Te:In crystals. We proposed and simulated the radiation defects type and amount of Cd0.9Zn0.1Te:In crystals after neutron irradiation with the Monte-Carlo software SRIM. The calculated data are also compared with experimental results of detector performance and the crystal defects obtained using thermally stimulated current (TSC)measurement. We also discuss the influence of defect concentrations on crystal resistivity and detector energy resolution. It was shown that the concentration of vacancies, interstitials, and their related defects increased after neutron irradiation, which could be the reason for the worsening of Cd0.9Zn0.1Te:In γ-ray detector performance after the neutron irradiation.
KW - CdZnTe radiation detector
KW - Defect level analysis
KW - Energy spectrum
KW - Neutron irradiation
UR - http://www.scopus.com/inward/record.url?scp=85065497879&partnerID=8YFLogxK
U2 - 10.1016/j.mssp.2019.05.002
DO - 10.1016/j.mssp.2019.05.002
M3 - 文章
AN - SCOPUS:85065497879
SN - 1369-8001
VL - 100
SP - 179
EP - 184
JO - Materials Science in Semiconductor Processing
JF - Materials Science in Semiconductor Processing
ER -